At their crudest, graffiti tags are generally used for the artist’s personal aggrandizement. While it is not uncommon for graffitists to tag the names legendary celebrities (Tupac anyone?) much more rare is the tagger who promotes the work of classical composers posthumously. Recently, tags of the name of the Bohemian-Austrian composer Gustav Mahler mysteriously appeared on the Queen Street Bridge and along Lake Shore Boulevard East. Who is this culturally aplomb tagger and why......